TY - JOUR A1 - Boersch, Ingo A1 - Füssel, Uwe A1 - Gresch, Christoph A1 - Großmann, Christoph A1 - Hoffmann, Benjamin ED - London, Springer T1 - Data mining in resistance spot welding - A non-destructive method to predict the welding spot diameter by monitoring process parameters JF - The International Journal of Advanced Manufacturing Technology N2 - Resistance spot welding is the dominant process in the present mass production of steel constructions without sealing requirements with single sheet thicknesses up to 3 mm. Two of the main applications of resistance spot welding are the automobile and the railway vehicle manufacturing industry. The majority of these connections has safety-related character and therefore they must not fall below a certain weld diameter. Since resistance spot welding has been established, this weld diameter has been usually used as the gold standard. Despite intensive efforts, there has not been found yet a reliable method to detect this connection quality non-destructively. Considerable amounts of money and steel sheets are wasted on making sure that the process does not result in faulty joints. The indication of the weld diameter by in-process monitoring in a reliable way would allow the quality documentation of joints during the welding process and additionally lead through demand-actuated milling cycles to a substantial decrease of electrode consumption. An annual, estimated reduction in the seven- to nine-figure range could be achieved. It has an important impact, because the economics of the process is essentially characterized by the electrode caps (Klages 24). We propose a simple and straightforward approach using data mining techniques to accurately predict the weld diameter from recorded data during the welding process. In this paper, we describe the methods used during data preprocessing and segmentation, feature extraction and selection, and model creation and validation. We achieve promising results during an analysis of more than 3000 classified welds using a model tree as a predictor with a success rate of 93 %. In the future, we hope to validate our model with unseen welding data and implement it in a real world application. KW - Resistance spot welding KW - Electrode life prognosis KW - Data mining KW - Feature extraction KW - Model selection Y1 - 2016 UR - http://link.springer.com/article/10.1007/s00170-016-9847-y U6 - https://doi.org/10.1007/s00170-016-9847-y ER - TY - CHAP A1 - Burow, S. A1 - Johannsen, Andreas A1 - Franczyk, B. T1 - Cloud Computing als Instrument moderner IT-Konsolidierung – IT-Dienstleistungszentren der öffentlichen Verwaltung in der Ebenen-übergreifenden Verzahnung digitaler Infrastrukturen T2 - Fachtagung Verwaltungsinformatik und Fachtagung Rechtsinformatik 2016 (FTVI & FTRI 2016), 21. - 23. September 2016, Dresden Y1 - 2016 ER - TY - CHAP A1 - Burow, Stephan A1 - Johannsen, Andreas T1 - Multi-level reference architecture development for digital public infrastructures based on the cloud T2 - Digital Enterprise Computing (DEC 2016) : June 14-15, 2016 : Böblingen, Germany Y1 - 2016 UR - https://dl.gi.de/handle/20.500.12116/959 SN - 978-3-88579-652-7 SP - 127 EP - 136 PB - Gesellschaft für Informatik e.V. (GI) CY - Bonn ER - TY - BOOK A1 - Hasche, Eberhard A1 - Ingwer, Patrick T1 - Game of colors: moderne Bewegtbildproduktion : Theorie und Praxis für Film, Video und Fernsehen KW - Farbbildverarbeitung KW - Filproduktion KW - HDTV KW - Videobearbeitung KW - Digitalkamera KW - Kameraarbeit KW - Dreidimensionales Video KW - Objektverfolgung KW - Rendering KW - Compositing Y1 - 2016 SN - 978-3-662-43888-6 (Print) SN - 978-3-662-43889-3 (Online) U6 - https://doi.org/10.1007/978-3-662-43889-3 PB - Springer Vieweg CY - Berlin, Heidelberg ER - TY - CHAP A1 - Jetschni, Jonas A1 - Meister, Vera G. T1 - Strukturiertes Wissen an Hochschulen T2 - TYPO3camp Berlin 2016 Y1 - 2016 ER - TY - GEN A1 - Kell, Gerald T1 - Entwurf von Anwenderspezifischen Schaltkreisen (ASICs) für hohe Taktfrequenzen unter dem Blickwinkel der Energieeffizienz Y1 - 2016 ER - TY - RPRT A1 - Kell, Gerald T1 - Ultraschneller RISC-basierter Operationsknoten in bipolarer SiGe-Technologie N2 - Das BMBF-geförderte Projekt EuRISCOSi soll unter anderem eine Standardzellen-Bibliothek für Taktfrequenzen bis 35GHz hervorbringen. Ziel ist der Entwurf von ultraschnellen ASICs für die Digitaltechnik. Technologische Basis sind SiGe-Transistoren mit Transitfrequenzen bis 500GHz. Y1 - 2016 ER - TY - GEN A1 - Kell, Gerald A1 - Schulz, Daniel T1 - Bausteine für digitale Halbleiterchips im Projekt EuRISCOSi N2 - Ultraschnelle Chips arbeiten mit zehnfacher Geschwindigkeit im Vergleich zu aktuell verwendeten CMOS Computerchips und sollen bis zur Marktreife gebracht werden. Für spezielle Anwendungen wird ein „Baukasten“ in Form einer wiederverwendbaren Bibliothek geschaffen. Anwender können mit den Bauelementen spezielle Mikrochips (ASICs) entwerfen, die digitale Daten mit Taktfrequenzen bis zu 35 GHz verarbeiten können. Y1 - 2016 ER - TY - JOUR A1 - Kell, Gerald A1 - Schulz, Daniel A1 - Mrkor, Kai-Uwe T1 - Application of IHP’s SiGe-Technology for very fast data processing JF - Activity Report 2016 / Europactice Y1 - 2016 UR - http://www.europractice-ic.com/docs/europractice_jv2016.pdf SP - 41 EP - 42 ER - TY - CHAP A1 - Kindsmüller, Martin Christof A1 - Wolters, Christian A1 - Heinecke, Andreas M. ED - Weyers, Benjamin T1 - Medieninformatik 2016: Was war, was ist, was soll sein? T2 - Mensch und Computer 2016 – Workshopbeiträge, 4. - 7. September 2016, Aachen Y1 - 2016 U6 - https://doi.org/10.18420/muc2016-ws15-0000 PB - Gesellschaft für Informatik e.V. CY - Aachen ER -